Valvert tries to insult Cyrano, telling him "Sir, your nose is. . .hmm. . .it is. . .very big!", (something that he's very sensitive to). Cyrano calmly responds that it is, but this insult was lousy, and proceeds to tell a Long List of better insults in many different styles. Than fights a duel with him, while improvising a ballad.
The truly bizarre and hilarious scene where Cyrano provides a distraction by jumping out of a tree and claiming to have fallen from the moon.